Approximate modern location: In France, very near the border
with Spain, in a village called "Santiago" which is close to the
city of Irun, Spain and Hendaye, France at the elbow of the Bay of Biscay.

Elm-Number [See below]: None.*

Other Comments: For a while our Order administered a
hospital here. Houses known locally as "Prioria" and "Insula
Hospitalis" both survive. The largest island in the river Bidasoa
is Santiago Aurrea, and across the Spanish border in Irun, there is a Calle
Santiago.

* This listing (and the numbers, with a few adjustments
after 1995) is based on the map contained in Kaspar Elm's Norbert von
Xanten: Adliger, Ordensstifter, Kirchenfürst, Wienand Verlag, Köln,
1984, page 328-329.